GamesIndustry International has an excerpt from their in-depth interview with Blizzard's Rob Pardo where the World of Warcraft lead designer expresses skepticism about the "endangered species" of AAA single-player games. "I don't see there being a great business model for it these days. It's really sad, there's just a lot of elements out there that conspire to make those games difficult to make now," he says. "Between pirating or the ability for people to rent games, it's hard for publishers to pour millions and millions of dollars into a game and not necessarily see the return they need to make those budgets realistic."

SC2 was only single player offline for 30 days at a time. D3 was not, in the minds of Blizzard, a single player game. They coded and marketed D3 as a MMO. So, Warcraft 3 was and will probably remain the last single player game from Blizzard.